Fuel-pump for internal-combustion engines.



V H. R. SETZ. I FUEL PUMP FOR. INTERNAL COMBUSTION ENGINES.

Patented Jan. 5, 1915.

APPLICATION FILED JULY ll 1914.

P Hm=1 tit) l l@m HANS R. SETZ, OF ST. LOUIS, MISSOURI, ASSIGNOR TO FULTON IRON WORKS, OF ST. LOUIS COUNTY, MISSOURI, A CORPORATION OF MISSOUR I.

FUEL-PUMP FOR I1\l' TERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Application filed July 11, 1914. Serial No. 850,464.

To all whom it may concern: Be it known that I, HANS R. Sam, :1 citizen of the United States of America, and a resident of the city of St. Louis, State ofv Missouri, have invented certain new and useful Improvements in Fuel-Pumps for Internal-Combustion Engines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to a pumping device adapted to force liquid fuel to the cylinder or cylinders of an internal combustion engme.

One of the objects is to provide a simple pumping device including a power pump and a manually operable pump, for forcing liquid fuel to the cylinder of an engine When the engine is in operation, and also previous to the engine being placed in operation. The manually operable pump is preferably arranged to draw liquid fuel through the power pump and the latter is preferably provided with a discharge valve, whichserves as an inlet valve for the manuallv operable pump.

Another object of the invention is the production of a manually operable pump having a pump chamber which serves as a manifold or distributing device for the fluid discharged from the power pump.

Figure I is a vertical section of my pumping device. Fig. 11 is a section taken approximately on the'line II-II, Fig. I.

In the accompanying drawings 1 designates the cylinder of a power pump, and 2 a plunger operable in said cylinder. A

cross-head 3, fixed to the outer end of the. plunger 2, is adapted to be oined, by a connection rod 4, to a rotating-part of an internal combustion engine. The power pump also includes a pump chamber -5 having an inlet port 6 adapted to be opened and closed by an inlet valve 7 and an exhaust port which is opened and closed by an exhaust valve 8. The fuel to be pumped to the engine cylinders is delivered through a supply pipe 9 to a compartment 10 adjoining the pump chamber 5, and during the suction strokes of the pump plunger 2, the inlet valve 7 opens to admit liquid fuel into the pump chamber 5. During the pressure strokes of the pump plunger 2 the liquid haust valve'8 'of th fuel displaced by the plunger is discharged Patented Jan. 5, 1915. v

15, and provided with a handle 16 at its outer end. The inner end of the plunger 14, arranged within the pump chamber 12, is

provided with a valve member 17 adapted to engage the d inner end of a tubular plunger gui e 15 extending from the stufing box When the manually operable pump is not in service, the valve memberl'i is seated on the inner end of the tubular member 15 and securely held by a nut 18 screwed onto the pump plunger 14 and engaging the outer face of the stufing box gland 19. The fluid is thus prevented from escaping into the stufling box when the power pump is in operation.

The distributing device associated with and forming part of the manually operable pump comprises valve housings 20 communicating with exhaust ports 21 through which the liquid fuel is discharged from the pump chamber 12, the delivery pipes 13 being secured to these valve housings. Each valve housing is preferably provided with a needle valve 22 partially close the passageway in the valve housing so as to insure a uniform flow of liquid fuel through the different pipes -13, which are not of equal lengths. Before the valve housings 20 are placed in position, exhaust valves preferably in the form of balls 23, are placed in the exhaust ports 21, and the openings through which these balls are inserted may be closed by plugs 24.

Themanually operable pump is intended to be used in filling the delivery pipes 13 with liquid fuel before starting the engine, and during the suction strokes of the plunger 14, which is operated by ,hand, the exe power pump opens to admit the liduid fuel to the pump chamber 12, said exhaust valve 8 serving as an inlet valve for the manually operable pump. During the pressure strokes of the plunger 14 the exhaust valves 23 open to permit the fuel to flow-through the difi'erent exhaust adapted to be adjusted to ports 21, through the valve housings 20, and into the delivery pipes 13, which lead to the engine cylinders.

A pumping device comprising -a power pump having an exhaust. port and an ex-.

valve, said pump chamber being in communication with the exhaust port of said power pump, and a manually operable plunger 1n said pump chamber adapted to draw fluid of said power through the exhaust port pump and into said pump chamber, and adapted to force said fluid through the plurality of exhaust ports in said pump chamber.

H. R. SETZ.

In the presence of E. K. CLARK, M. M.;A PoA n. 

